64172877931066 has 16 divisors (see below), whose sum is σ = 99380077648128. Its totient is φ = 31046510829600.

The previous prime is 64172877931049. The next prime is 64172877931073. The reversal of 64172877931066 is 66013977827146.

It is a junction number, because it is equal to n+sod(n) for n = 64172877930992 and 64172877931010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80964400 + ... + 81753163.

It is an arithmetic number, because the mean of its divisors is an integer number (6211254853008).

Almost surely, 2^{64172877931066} is an apocalyptic number.

64172877931066 is a deficient number, since it is larger than the sum of its proper divisors (35207199717062).

64172877931066 is a wasteful number, since it uses less digits than its factorization.

64172877931066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162723957.

The product of its (nonzero) digits is 128024064, while the sum is 67.

The spelling of 64172877931066 in words is "sixty-four trillion, one hundred seventy-two billion, eight hundred seventy-seven million, nine hundred thirty-one thousand, sixty-six".